EP2198328B1 - Mini-borne de connexion - Google Patents

Mini-borne de connexion Download PDF

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Publication number
EP2198328B1
EP2198328B1 EP08838182.7A EP08838182A EP2198328B1 EP 2198328 B1 EP2198328 B1 EP 2198328B1 EP 08838182 A EP08838182 A EP 08838182A EP 2198328 B1 EP2198328 B1 EP 2198328B1
Authority
EP
European Patent Office
Prior art keywords
cable
fiber
terminal
disposed
adapters
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08838182.7A
Other languages
German (de)
English (en)
Other versions
EP2198328A2 (fr
Inventor
Erik Gronvall
Paula Rudenick
Yu Lu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commscope Connectivity LLC
Original Assignee
ADC Telecommunications Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ADC Telecommunications Inc filed Critical ADC Telecommunications Inc
Priority to EP13197657.3A priority Critical patent/EP2722700A1/fr
Publication of EP2198328A2 publication Critical patent/EP2198328A2/fr
Application granted granted Critical
Publication of EP2198328B1 publication Critical patent/EP2198328B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4441—Boxes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4471—Terminating devices ; Cable clamps
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3897—Connectors fixed to housings, casing, frames or circuit boards
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4471—Terminating devices ; Cable clamps
    • G02B6/4477—Terminating devices ; Cable clamps with means for strain-relieving to interior strengths element

Definitions

  • the present disclosure relates to fiber optic cable termination systems, and more particularly, to drop terminals used in fiber optic cable telecommunication systems.
  • Fiber optic cables are widely used to transmit light signals for high speed data transmission.
  • a fiber optic cable typically includes: (1) an optical fiber or optical fibers; (2) a buffer or buffers that surrounds the fiber or fibers; (3) a strength layer that surrounds the buffer or buffers; and (4) an outer jacket.
  • Optical fibers function to carry optical signals.
  • a typical optical fiber includes an inner core surrounded by a cladding that is covered by a coating.
  • Buffers e.g., loose or tight buffer tubes
  • Strength layers add mechanical strength to fiber optic cables to protect the internal optical fibers against stresses applied to the cables during installation and thereafter.
  • Example strength layers include aramid yarn, steel and epoxy reinforced glass roving.
  • Outer jackets provide protection against damage caused by crushing, abrasions, and other physical damage.
  • Outer jackets also provide protection against chemical damage (e.g., ozone, alkali, acids).
  • Fiber optic cable connection systems are used to facilitate connecting and disconnecting fiber optic cables in the field without requiring a splice.
  • a typical fiber optic cable connection system for interconnecting two fiber optic cables includes fiber optic connectors mounted at the ends of the fiber optic cables, and an adapter for mechanically and optically coupling the fiber optic connectors together.
  • Fiber optic connectors generally include ferrules that support the ends of the optical fibers of the fiber optic cables. The end faces of the ferrules are typically polished and are often angled.
  • the adapter includes co-axially aligned ports (i.e., receptacles) for receiving the fiber optic connectors desired to be interconnected.
  • the adapter includes an internal sleeve that receives and aligns the ferrules of the fiber optic connectors when the connectors are inserted within the ports of the adapter. With the ferrules and their associated fibers aligned within the sleeve of the adapter, a fiber optic signal can pass from one fiber to the next.
  • the adapter also typically has a mechanical fastening arrangement (e.g., a snap-fit arrangement) for mechanically retaining the fiber optic connectors within the adapter.
  • a mechanical fastening arrangement e.g., a snap-fit arrangement
  • PONS passive optical networks
  • a service provider may employ a central office, or head end, containing electronic equipment for placing signals onto optical fibers running to user premises.
  • End user premises may employ equipment for receiving optical signals from the optical fibers.
  • the central office, or head end, transmission equipment and/or the transmission equipment located at the end user premises may, respectively, use a laser to inject data onto a fiber in a manner that may not require the use of any active components, such as amplifiers between the central office, or head end, and/or the end user premises.
  • PONS may be attractive to service providers because passive networks may be less costly to maintain and/or operate as compared to active optical networks and/or older copper based networks, such as a public switched telephone network (PSTN).
  • PSTN public switched telephone network
  • PONS may provide sufficient bandwidth to meet a majority of end users' high bandwidth communication needs into the foreseeable future.
  • transmission equipment may transmit signals containing voice, data and/or video over a fiber strand to the premises.
  • An optical fiber may be split using, for example, passive optical splitters so that signals are dispersed from one fiber (the input fiber) to multiple output fibers running to, for example, user premises from a convergence point in the network.
  • An optical fiber routed to a user's premises may be routed via a fiber drop terminal en route to the premises.
  • signals appearing on one or more optical fibers may be routed to one or more end user premises.
  • Fiber drop terminals may be mounted in aerial applications, such as near the tops of utility poles, along multi-fiber and/or multi- conductor copper strands suspended between utility poles.
  • Fiber drop terminals may also be installed in junction boxes mounted at ground level and/or in below-grade vaults where utilities are run below ground.
  • Example fiber drop terminals are disclosed at U.S. Patent No. 7,120,347 ; U.S. Patent Publication No. 2005/0213921 ; and U.S. Patent Publication No. 2006/0153517 . Further related drop terminals can be seen in US 2005/175307 and US 2005/271344 .
  • An aspect of the present disclosure relates to a terminal for mounting to a fiber distribution cable as seen in claim 1.
  • the terminal includes, amongst other aspects, a housing having a base and a cover. The cover is connectedly engaged with the base.
  • the terminal further includes a plurality of adapters disposed on the cover.
  • a fiber routing tray having a top panel and a bottom panel is disposed in an interior cavity defined by the base and the cover.
  • the fiber routing tray includes a storage space defined between the top and bottom panels for storing a length of optical fiber.
  • An anchor block is provided for securing the fiber distribution to the housing.
  • the terminal 10 for mounting to a fiber distribution cable 12 is shown.
  • the terminal 10 includes a housing, generally designated 14, having a base, generally designated 16, and a cover, generally designated 18.
  • the cover 18 includes an outer surface 20, an oppositely disposed rear surface 22, a top wall 24, an oppositely disposed bottom wall 26, and sidewalls 28.
  • the terminal 10 defines a footprint area that is defined by an outer perimeter 30 of the cover 18.
  • the footprint area is defined by the top wall 24, the bottom wall 26, and the sidewalls 28.
  • the footprint area is generally rectangular in shape. It will be understood, however, that the scope of the present disclosure is not limited to the cover having a footprint that is generally rectangular in shape.
  • the footprint area of the terminal 10 is less than 161.29 cm 2 (25 in 2 ). In another possible scenario, the footprint area of the terminal 10 is less than 135.4836 cm 2 (21 in 2 ).
  • the outer surface 20 of the cover 18 includes a plurality of angled steps, generally designated 32.
  • angled steps 32a, 32b, 32c, 32d there are four angled steps 32a, 32b, 32c, 32d.
  • the angled steps 32 are configured on the outer surface 20 of the cover 18 in arcuate shaped rows. This arcuate row configuration efficiently utilizes space on the outer surface 20 of the cover 18 thereby allowing for a compact size of the terminal 10.
  • each angled step 32 includes a plurality of mounting surfaces 34 on which are disposed adapters 36.
  • each angled step 32a, 32b, 32c, 32d includes three mounting surfaces 34a, 34b, 34c.
  • Each mounting surface 34a, 34b, 34c is disposed on the angled step 32 such that each mounting surface 34a, 34b, 34c is oriented at an oblique angle ⁇ (shown in FIG. 3A ) to the base 16 and forms a mating angle ⁇ (shown in FIG. 3B ) with each adjacent mounting surface 34a, 34b, 34c on the angled step 32.
  • the mating angle ⁇ is defined as the space between adjacent mounting surfaces 34 having a common edge with the adjacent mounting surfaces 34 diverging from each other.
  • the mounting surface 34a of the angled step 32a shares a common edge 39 (shown only in FIG. 1B ) with the adjacent mounting surface 34b.
  • the mounting surface 34a forms a mating angle ⁇ 1 with the mounting surface 34b.
  • the mating angle ⁇ 1 which is measured on the outer surface 20 of the cover 18, is an oblique angle.
  • the mating angle ⁇ 1 is less than about 210 degrees. In one possibility, the mating angle ⁇ 1 is about 190 degrees.
  • the mounting surface 34c forms a mating angle ⁇ 2 with the mounting surface 34b.
  • the mating angle ⁇ 2 is an oblique angle. In the subject disclosure, and by way of example only, the mating angle ⁇ 2 is less than about 210 degrees. In one scenario, the mating angle ⁇ 2 is about 190 degrees. The angling of each of the mounting surfaces 34 with respect to the base 16 and to the adjacent mounting surfaces 34 further efficiently utilizes the space of the outer surface 20 of the cover 18 thereby allowing for a compact size of the terminal 10.
  • the adapters 36 are oriented on each of the angled steps 32 such that one adapter 36 is disposed on each of the mounting surfaces 34 of each of the angled steps 32.
  • the adapters 36 are oriented on the mounting surfaces 34 such that the adapters 36 are generally perpendicular to the corresponding mounting surfaces 34.
  • the adapters 36 are oriented in an arcuate configuration on each of the angled steps 32.
  • the adapters 36 include a first port 37 for receiving a connectorized end of a first cable and a second port 38 for receiving a connectorized end of a second cable.
  • the first cable is optically coupled to the second cable when the connectorized ends of the first and second cables are positioned within their respective ports 37, 38 of the adapter 36.
  • the adapters 36 of the subject disclosure have been described in U.S. Patent Application Serial No. 11/657,404, which was filed on January 24, 2007 . It will be understood, however, that the scope of the present disclosure is not limited to the adapters 36 shown as the adapters 36 can be any of a variety of adapters 36 including, but not limited to SC, angled SC, dual SC (shown only in FIG. 5 ), LC, dual LC, etc.
  • adapter density is defined as the number of adapters 36 per footprint area of the terminal 10.
  • the adapter density can be simplified to the number of adapters per square inch.
  • a terminal 10 having a high adapter density is desired as this provides a more efficient utilization of space than a terminal 10 having a lower adapter density.
  • adapter density is greater than or equal to about 12 adapters per 161.29 cm 2 (25 in 2 ), or 0.0744 adapters/cm 2 (0.48 adapters/in 2 ).
  • the adapter density is greater than or equal to about 12 adapters per 135.4836 cm 2 (21 in 2 ), or 0.088 adapters/cm 2 (0.57 adapters/in 2 ).
  • the adapter density is greater than or equal to about 24 adapters per 161.29 cm 2 (25 in 2 ), or 0.1488 adapters/cm 2 (0.96 adapters/in 2 ).
  • the adapter density is greater than or equal to about 0.1767 adapters/cm 2 (1.14 adapters/in 2 ).
  • the interior cavity 40 includes an open end 42 disposed on the rear surface 22 of the cover 18.
  • the bottom wall 26 of the cover 18 includes a tail piece 44 that extends outwardly from the bottom wall 26.
  • the tail piece 44 extends outwardly in a direction that is generally perpendicular to the bottom wall 26.
  • the tail piece 44 defines a longitudinal axis 46 (shown as a dashed line in FIG. 2 ).
  • the tail piece 44 further defines a cable opening 48 that extends through the tail piece 44 along the longitudinal axis 46 such that the cable opening 48 is in communication with the interior cavity 40.
  • the tail piece 44 surrounds.
  • the anchor block 50 includes a main body 52 that extends from a first end 54 to a second end 56 of the anchor block 50.
  • the main body 52 is elongated along a center axis 58 (shown as a dashed line in FIG. 6 ) of the anchor block 50.
  • the main body 52 of the anchor block 50 is configured to mechanically interlock with the cover 18 of the terminal 10.
  • the main body 52 includes first and second interlocking tabs 60, 62 that project outwardly from the main body 52 in opposite directions relative to the center axis 58.
  • the first and second interlocking tabs 60, 62 are configured to be received within corresponding first and second interlock receptacles provided within the interior cavity 40 of the cover 18 adjacent to the bottom end 26.
  • interference between the first and second interlocking tabs 60, 62 and the structure forming the corresponding first and second interlock receptacles resists movement of the anchor block 50 in a direction along the center axis 58.
  • the first end 54 of the anchor block 50 is disposed in the interior cavity 40 of the cover 18 while the second end 56 of the anchor block 50 is disposed in the cable opening 48 of the tail piece 44.
  • the length of the anchor block 50 disposed in the cable opening 48 of the tail piece 44 is greater than 25%.
  • the length of the anchor block 50 disposed in the cable opening 48 of the tail piece 44 is greater than 50%.
  • the length of the anchor block disposed in the cable opening 48 of the tail piece 44 is in the range of 25% to 50%.
  • the anchor block 50 also includes structure for securing the fiber distribution cable 12 to the main body 52.
  • the second end 56 includes a central groove 64 for receiving a central buffer tube of the fiber distribution cable 12.
  • the second end 56 also includes two side grooves 66 that are generally parallel to the central groove 64 and positioned on opposite sides of the central groove 64.
  • the side grooves 66 are sized to receive strength members of the fiber distribution cable 12.
  • the anchor block 50 also includes a fan-out portion, generally designated 68, that fans-out/spreads-apart optical fibers of the fiber distribution cable 12 that are routed and managed within the interior cavity 40 of the cover 18.
  • the anchor block 50 includes a fan-out channel 70 that extends from the central groove 64 to the first end 54 of the main body 52 of the anchor block 50.
  • the fan-out channel 70 has a width W1 that gradually widens as the fan-out channel 70 extends along the center axis 58 from the central groove 64 to the first end 54 of the anchor block 50.
  • a divider 72 (see FIG. 7 ) is located within the fan-out channel 70 at the first end 54 of the anchor block 50.
  • the divider 72 includes a plurality of openings 74 that individually receive the optical fibers to maintain separation of the optical fibers.
  • the optical fibers extend from the end of the central buffer tube through the fan-out channel 70 to the divider 72.
  • the optical fibers each extend through one of the openings 74 of the divider 72.
  • the tapered configuration of the fan-out channel 70 allows the optical fibers to spread apart as the optical fibers extend from the end of the central buffer tube at the central groove 64 to the divider 72.
  • a securing material e.g., an adhesive such as epoxy
  • a cable seal for sealing the fiber distribution cable 12 in the tail piece 44 of the cover 18 is shown.
  • the cable seal 76 is made of an elastic material such as rubber.
  • the cable seal 76 includes a first surface 78, an oppositely disposed second surface 80 and a plurality of side surfaces 82.
  • the cable seal 76 further includes a plurality of chamfers 84 that are located between the first surface 78 and each of the side surfaces 82.
  • the cable seal 76 defines a cable entry hole 86 that extends through the cable seal 76.
  • the cable entry hole 86 extends through the cable seal 76 in a direction that is generally perpendicular to the first surface 78.
  • the cable entry hole 86 is sized to receive and sealing engage the fiber distribution cable 12.
  • the cable entry hole 86 is generally shaped as an elongated circle in order to conform to the fiber distribution cable 12. It will be understood, however, that the scope of the present disclosure is not limited to the cable entry hole 86 being shaped as an elongated circle.
  • the cable seal 76 is configured to be inserted into the cable opening 48 of the tail piece 44.
  • the cable seal 76 is inserted into the cable opening 48 such that the first surface 78 faces the interior cavity 40 of the cover.
  • the chamfers 84 which are disposed between the first surface 78 and each of the side surfaces 82, ease the insertion of the cable seal 76 in the cable opening 48.
  • the side surfaces 82 of the cable seal 76 are in sealing engagement with the tail piece 44.
  • the cable seal 76 provides sealing engagement between the cable opening 48 of the tail piece 44 and the fiber distribution cable 12.
  • the terminal 10 includes the base 16 and the cover 18.
  • the base 16 is adapted for snap-fit engagement with the cover 18 through a latch 88, which is disposed on each longitudinal side 90 of the base, having a plurality of openings 92 adapted for engagement with a plurality of protrusions 94 disposed on each of the sidewalls 28 of the cover 18.
  • the terminal 10 further includes a fiber routing tray, generally designated 96.
  • the fiber routing tray 96 includes a top panel 98, a bottom panel 100, and first and second side panels 102a, 102b disposed about the periphery of the top and bottom panels 98, 100 (directional references such as top and bottom are made with regard to FIG. 10 ).
  • the top panel 98 is disposed above the bottom panel 100 such that the top and bottom panels 98, 100 define a storage space 104 (best shown in FIG. 12 ) between the top and bottom panels 98, 100.
  • the first side panel 102a is in connected engagement with both of the top and bottom panels 98, 100 while the second side panel 102b is in connected engagement with the bottom panel 100.
  • each of the first and second side panels 102a, 102b extend between the top and bottom panels 98, 100 in a direction that is generally perpendicular to the top and bottom panels 98, 100. It will be understood, however, that the scope of the present disclosure is not limited to the first and second side panels 102a, 102b extending between the top and bottom panels 98, 100 in a direction that is generally perpendicular.
  • the bottom panel 100 includes a plurality mounting holes 106.
  • the mounting holes 106 are sized to receive mounting pins 108 (shown in FIG. 9 ) disposed in the interior cavity 40 of the cover 18.
  • the top panel 98 also includes a plurality of holes 113 adapted to receive the mounting pins 108 disposed in the interior cavity 40 of the cover 18. In the subject disclosure, and by way of example only, there are two holes 113 disposed on the top panel 98 so as to be in alignment with the mounting holes 106 disposed on the bottom panel 100 at the bottom end portion 112.
  • the bottom panel 100 further includes a ramp portion 114 disposed at the bottom end portion 112 of the bottom panel 100.
  • the ramp portion 114 is disposed at an angle ⁇ with respect to the bottom end portion 112 of the bottom panel 100.
  • the ramp portion 114 is disposed at an angle that is less than or equal to 45 degrees from the bottom end portion 112 of the bottom panel 100.
  • the ramp portion 114 provides a location for optical fibers 124 disposed in the interior cavity 40 of the cover 18 and engaged with the adapters 36 to enter the storage space 104 of the fiber routing tray 96.
  • the fiber routing tray 96 is a continuous piece of material.
  • the second side panel 102b is bent at a first fold 116, which is disposed between the bottom panel 100 and the second side panel 102b, such that the second side panel 102b is generally perpendicular to the bottom panel 100.
  • the first side panel 102a is bent at a second fold 118 disposed between the bottom panel 100 and the first side panel 102a such that the first side panel 102a is generally perpendicular to the bottom panel 100.
  • the top panel 98 is bent at a third fold 120 disposed between the top panel 98 and the first side panel 102a such that the top panel 98 is generally perpendicular to the first side panel 102a.
  • the ramp portion 114 is bent at a forth fold 122 disposed between the ramp portion 114 and the bottom end portion 112 of the bottom panel 100 such that the ramp portion 114 is disposed at an angle ⁇ with respect to the bottom end portion 112 of the bottom panel 100.
  • optical fibers 124 that are engaged with the adapters 36 are routed into the storage space 104 of the fiber routing tray 96 through the ramp portion 114 of the bottom panel 100.
  • the optical fibers 124 are bend insensitive fibers.
  • An exemplary bend insensitive fiber is BendBright XS produced by Draka Comteq. It will be understood, however, that the scope of the present disclosure is not limited to BendBright XS fiber as various bend insensitive fibers could be used.
  • Exemplary disclosures of bend insensitive fibers include U.S. Patents 4,838,643 and 5,278,931 . In the event that bend insensitive fibers are not used, bend radius protectors may be installed to prevent attenuation of the optical fibers 124.
  • the optical fibers 124 are routed from the ramp portion 114 of the bottom panel 100 through a passage 126 defined between one of the mounting pins 108 and the adjacent sidewall 28 (shown as a dashed line in FIG. 13 ) of the cover 18. The optical fibers 124 are then loosely coiled in the storage space 104 such that the coils of optical fibers 124 are interiorly disposed with respect to the mounting pins 108.
  • the optical fibers 124 are in connected engagement with a fan-out device 128 that combines the individual optical fibers 124 into a multi-fiber optic cable 130.
  • the multi-fiber optic cable 130 then exits the storage space 104 of the fiber routing tray 96 and the interior cavity 40 of the cover 18 through the cable opening 48 of the tail piece 44.
  • a multi-fiber splice 132 connects the multi-fiber optic cable 130 to the fiber distribution cable 12.
  • the multi- fiber optic cable 130 can be pulled from the storage space 104 of the fiber routing tray 96 through the cable opening 48 of the tail piece 44 of the cover 18.
  • the loosely coiled arrangement of optical fibers 124 in the storage space 104 of the fiber routing tray 96 allows for the multi-fiber optic cable 130 to be pulled from the storage space 104 without having to disassemble the housing 14. This is advantageous as it does not disrupt or create any potential disruption of the connections between the pre-assembled optical fibers 124 and the adapters 36.
  • the multi-fiber optic cable 130 can be pulled from the terminal 10, the multi- fiber optic cable 130 is protected from being pulled too far out of the tail piece 44 by the routing of the optical fibers 124 through the passage 126, which is disposed between one of the mounting pins 108 and the adjacent sidewall 28 of the cover 18.
  • the optical fibers 124 will rap around the mounting pin 108 thereby providing resistance which will notify the installer that the storage limit has been reached.
  • a retention device for securing the fiber distribution cable 12 to the terminal 10 after splicing the fiber distribution cable 12 to the multi-fiber optic cable 130 will be described.
  • the retention device 134 is connectedly engaged with the tailpiece 44 of the cover 18 of the housing 14 such that the retention device 134 extends outwardly from the tail piece 44.
  • the retention device 134 extends outwardly from the tail piece 44 in a direction that is generally perpendicular to the bottom wall 26 of the cover 18.
  • the retention device 134 includes a base piece, generally designated 136, a body, generally designated 138, and a cover piece, generally designated 140.
  • the base piece 136 is an integral part of the tail piece 44 of the cover 18. It will be understood, however, that the scope of the present disclosure is not limited to the base piece 136 being integral with the tail piece 44.
  • the base piece 136 includes longitudinal sidewalls 142 with each longitudinal sidewall 142 having a catch 144.
  • the base piece 136 defines longitudinal slots 146. In the subject embodiment, and by way of example only, there are two longitudinal slots 146.
  • the longitudinal slots 146 are oriented in the base piece 136 so as to be generally parallel to the center axis 58 of the tail piece 44. It will be understood, however, that the scope of the present disclosure is not limited to the longitudinal slots 146 being generally parallel to the center axis 58 of the tail piece 44.
  • the body 138 of the retention device 134 includes a lower surface 148, an oppositely disposed upper surface 150, a front side 152, a back side 154, and longitudinal sides 156 (directional references such as upper, lower, front and back are relative to FIG. 16 ).
  • the body 138 further includes a central axis 158 that is centrally disposed in the body 138.
  • the lower surface 148 includes longitudinal protrusions 160 that extend downwardly from the lower surface 148 in a direction that is generally perpendicular to the lower surface 148.
  • the longitudinal protrusions 152 are configured to be received in the longitudinal slots 146 of the base piece 136 in order to aid in the retention of the body 138 in the base piece 136.
  • the upper surface 150 defines a fiber passage, generally designated 161.
  • the fiber passage 161 includes a cable jacket cavity 162 disposed near the front side 152 of the body 138.
  • the cable jacket cavity 162 is adapted to receive the cable jacket of the fiber distribution cable 12.
  • the cable jacket cavity 162 includes a plurality of grasping protrusions that extend outwardly from the cable jacket cavity 162. The grasping protrusions aid in the retention of the fiber distribution cable 12 in the retention device 134.
  • the fiber passage 161 further includes a first center groove 164 disposed adjacent to the cable jacket cavity 162.
  • the first center groove 164 is aligned with the central axis 158 of the body 138.
  • the first center groove 164 is adapted to receive a buffer tube of the fiber distribution cable 12.
  • Disposed on either side of the first center groove 164 are side grooves 166.
  • the side grooves 166 are generally parallel to the first center groove 164.
  • the side grooves 166 are adapted to receive strength members of the fiber distribution cable 12.
  • the fiber passage 161 defined by the upper surface 150 of the body 138 further includes a recess 168 disposed adjacent to the first center groove 164 and the side grooves 166.
  • the recess 168 is the dividing line between the fiber distribution cable 12 and the multi-fiber optic cable 130.
  • the recess 168 is adapted to receive the multi-fiber splice 132 that optically couples the optical fibers of the fiber distribution cable 12 and the multi-fiber optic cable 130 and a crimp that couples and retains the strength members of the fiber distribution cable 12 to strength members in the multi-fiber optic cable 130.
  • the fiber passage 161 also includes a second center groove 170 that extends from the recess 168 through the back side 154 of the body 138.
  • the second center groove 170 is aligned with the central axis 158 of the body 138.
  • the second center groove 170 is adapted to receive a buffer tube of the multi-fiber optic cable 130.
  • Disposed on either side of the second center groove 170 are grooves 172.
  • the grooves 172 are generally parallel to the second center groove 170.
  • the grooves 172 are adapted to receive strength members of the multi-fiber optic cable 130.
  • a plurality of adhesive recesses 174 is defined by the upper surface 150 of the body 138.
  • the adhesive recesses 174 provide a receptacle for adhesive (such as epoxy, etc.).
  • the adhesive can be used to secure the fiber distribution cable 12 and the multi-fiber optic cable 130 in the retention device 134.
  • the type of adhesive used in the adhesive recesses 174 will affect the force required to remove the fiber distribution cable 12 and the multi- fiber optic cable 130 by pulling on the cables (pull-out force).
  • Each adhesive recess 174 defines a plurality of adhesive passages 176 that provide communication between the adhesive recess 174 and the fiber passage 161.
  • the adhesive passages 176 allow for adhesive that is poured into the adhesive recesses 174 to flow into the fiber passage 161.
  • each of the longitudinal sides 156 of the body 138 defines a latch groove 178.
  • the cover piece 140 includes a top surface 180, a bottom surface 182, a tail-piece end 184, and a distribution cable end 186 (directional references such as top and bottom are relative to FIG. 14 ).
  • the tail-piece end 184 includes a retention protrusion, generally designated 188, having a body portion 190 and a retention portion 192.
  • the body portion 190 of the retention protrusion 188 extends outwardly from the top surface 180 in a direction that is generally perpendicular to the top surface 180. It will be understood, however, that the scope of the present disclosure is not limited to the body portion 190 of the retention protrusion 188 extending outwardly in a direction that is generally perpendicular to the top surface 180.
  • the retention portion 192 of the retention protrusion 188 extends outwardly from the body portion 190 and defines a retention groove 194.
  • the retention groove 194 extends along the length of the retention portion 192 such that the retention groove 194 is generally transverse to a central longitudinal axis 196 defined by the cover piece 140.
  • the retention protrusion 188 is hook-shaped. This configuration allows the retention protrusion 188 to receive a lip 198 (shown on FIG. 15 ) disposed around the tail piece 44 of the cover 18 for laterally retaining the retention device 134 to the cover 18.
  • the bottom surface 182 of the cover piece 140 defines a cable passage, generally designated 200.
  • the cable passage 200 includes a jacket cavity 202, a first cable recess 204 disposed adjacent to the jacket cavity 202 and aligned generally with the central longitudinal axis 196, a strength groove 206 disposed on either side of the first cable recess 204 and disposed generally parallel to the central longitudinal axis 196, a crimp recess 208 disposed adjacent to the first cable recess 204, a second cable recess 210 that extends from the crimp recess 208 through the back side 186 of the cover piece and is generally aligned with the central longitudinal axis 196, and a strength member groove 212 disposed on either side of the second cable recess 210.
  • the cavities and recesses defined on the bottom surface 182 of the cover piece 140 are oriented on the bottom surface 182 so that the cavities and recesses are aligned with the cavities and recesses defined on the upper surface 150 of the body 138 when the body 138 and the cover 140 are engaged.
  • the cover 140 further includes a plurality of resilient latches, generally designated 214.
  • Each of the resilient latches 214 includes a base end 218 and an oppositely disposed free end 220.
  • the base end 218 is in connected engagement with the side 216.
  • the free end 220 of the resilient latch 214 extends outwardly from the side 216 in a direction that is generally perpendicular to an outer edge 222 of the side 216.
  • the base end 218 of the resilient latch 214 is integral with the side 216.
  • the free end 220 includes a lip protrusion 224 and a sloped surface 226.
  • the body 138 of the retention device 134 is inserted into the base piece 136 such that the longitudinal slots 146 receive the longitudinal protrusions 160.
  • the multi-fiber splice 132 which connects the fiber distribution cable 12 and the multi-fiber optic cable 130, is inserted into the recess 168 of the body 138 of the retention device 134.
  • the multi-fiber splice 132 is inserted into the recess 168 such that the cable jacket, the buffer tube, and strength members of the fiber distribution cable 12 are inserted into the cable jacket cavity 162, the first center groove 164 and the side grooves 166, respectively, and the buffer tube and the strength members of the multi-fiber optic cable 130 are inserted into the second center groove 164 and the grooves 172, respectively.
  • the cover piece 140 With the multi-fiber splice 132 properly inserted into the body 138, the cover piece 140 is engaged with the base piece 136 such that the fiber distribution cable 12 and the multi-fiber optic cable 130 are disposed in the fiber passage 200 of the bottom surface 182 of the cover piece 140.
  • the cover piece 140 is then pressed toward the base piece 136 such that the resilient latches 214 of the cover piece 140 engage the catches 144 of the base piece 136.
  • Epoxy can be added to the body 138 and/or the cover piece 140 prior to the engagement of the cover piece with the base piece 136 in order to secure the fiber distribution cable 12 in the retention device 134.
  • a boot 228 is molded over the retention device 134 and the tail piece 44 of the cover 18 following the installation of the fiber distribution cable 12 and the multi-fiber optic cable 130 in the retention device 134.
  • the boot 228 includes a plurality of strain relief grooves 230 disposed near a cable end 232 of the boot 228.
  • the multi-fiber optic cable 130 is pulled from the interior cavity 40 through the tail end 44 of the housing 14.
  • the multi-fiber optic cable 130 is then spliced to the fiber distribution cable 12 with a multi-fiber splice 132.
  • the multi-fiber optic cable 130 With the multi-fiber optic cable 130 spliced to the fiber distribution cable 12, the multi-fiber optic cable 130 is inserted back into the interior cavity 40 of the housing 14 through the tail end 44 of the cover 18.
  • a spliced end of the multi-fiber optic cable 130, the multi-fiber splice 132, and a spliced end of the fiber distribution cable 12 are then inserted into the body 138 of the retention device 134.
  • epoxy is installed in the adhesive recesses 174 of the body 138 to secure the fiber distribution cable 12 in the retention device 134.
  • the cover piece 140 is then inserted over the body 138 of the retention device 134 such that the resilient latches 214 of the cover piece 140 engage the catches 144 of the base piece 136.
  • the boot 228 is molded over the retention device 134 to prevent dust, rain, snow, or ice from entering the terminal 10.
  • the boot 228 is molded over a portion of the tail end 44 of the cover 18, the retention device 134 and an end portion of the fiber distribution cable 12.
  • the retention device 400 includes the base piece 136, a body 402, and a cover piece 404.
  • the body 402 and the cover piece 404 are similar to the body 138 and the cover piece 140 described with regard to the retention device 134.
  • each of the body 402 and the cover piece 404 include a grounding opening 405 (shown in FIG. 24 ) that is adapted to receive a grounding lug assembly, generally designated 406.
  • the grounding opening 405 is defined near fiber distribution cable ends 407 (shown in FIG. 24 ) of the body 402 and the cover piece 404.
  • the grounding opening 405 extends through a cable jacket recess 409 defined at the fiber distribution cable ends 407 of the body 402 and the cover piece 404.
  • a plurality of descriptions of the grounding lug assembly 406 has been provided in U.S. Patent Application Serial No. 11/157,561, which was filed on June 21, 2005 .
  • the grounding lug assembly 406 includes a lug 408, a compression insert 410, and a nut 412.
  • the lug 408 includes a first axial end portion 414 and a second axial end portion 416.
  • the first axial end portion 414 is bifurcated with external threads 418, which are adapted to engage with the nut 412, disposed on an outer surface of the first axial end portion 414.
  • the first axial end portion 414 defines a cable slot 420 which is adapted to receive cable sheathing 422 that covers the fiber distribution cable 12.
  • cable sheathing 422 (or cable armor) is a sheathing that is made of steel or aluminum.
  • the second axial end portion 416 of the lug 408 includes a plurality of threads 423 disposed on an outer surface of the second axial end portion 416.
  • the plurality of threads 423 is adapted to threadedly engage internal threads disposed on a grounding nut 424.
  • the second axial end portion 416 is adapted to engage a grounding wire (such as a #6 wire).
  • the compression insert 410 includes an upper portion 425 having curved end surfaces 426.
  • the upper portion 425 fits within the nut 412 and has a slightly smaller diameter than the curvature of the external threads 418 on the first axial end portion 414 so as not to interfere with advancement of the nut 412 along the external threads 418.
  • the compression insert 410 further includes a lower portion 428 having a nut engaging surface 430 and a cable engaging surface 432.
  • the nut engaging surface 430 includes a plurality of nut engaging tabs 434 that are configured for engaging the nut 412 as it advances along the external threads 418 of the first axial end portion 414.
  • the cable engaging surface 432 defines a cable recess 436 having a pair of shoulders 438 disposed along the cable recess 436.
  • the cable recess 4 is adapted for receiving the cable sheathing 422 of the fiber distribution cable 12.
  • the shoulders 438 are adapted to engage corresponding shoulders 440 disposed in the cable slot 420. The engagement of the shoulders 438 and the corresponding shoulders 440 prevents over compression of the fiber distribution cable 12, which might lead to damage of the optical fibers within the fiber distribution cable 12.
  • the protective boot 442 is molded over the retention device 400, a portion of the tail piece 44 of the cover 18, and a portion of the grounding lug assembly 406 following the installation of the fiber distribution cable 12 and the multi-fiber optic cable 130 in the retention device 400.
  • the protective boot 442 includes a plurality of strain relief grooves 444 disposed near a cable end 446 of the protective boot 442.
  • the second axial end portion 416 and the grounding nut 425 are not over molded by the protective boot 442. This exposure of the second axial end portion 416 and the grounding nut 425 allows the cable sheathing 422 to be grounded by a grounding wire.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Claims (8)

  1. Élément terminal (10) destiné à être monté sur un câble de distribution en fibres (12), comprenant :
    un boîtier (14) définissant une ouverture à câble pour recevoir une extrémité du câble de distribution en fibres (12), le boîtier (14) incluant :
    une base (16) ; et
    un couvercle (18) engagé de façon connectée avec la base (16), ledit couvercle (18) incluant une pièce de queue (44) qui se projette vers l'extérieur depuis le couvercle (18), la pièce de queue (44) définissant une ouverture à câble (48) ;
    une pluralité d'adaptateurs (36) disposés sur le couvercle (18) ;
    un plateau de cheminement de fibres (96) ayant un panneau supérieur (98) et un panneau inférieur (100) et étant disposé dans une cavité intérieure (40) définie par la base (16) et par le couvercle (18), dans lequel le plateau de cheminement de fibres (96) inclut un espace de stockage (104) défini entre le panneau supérieur (98) et le panneau inférieur (100) pour stocker une longueur de fibre optique ; et
    un bloc d'ancrage (50) pour attacher le câble de distribution en fibres (12) au boîtier (14), dans lequel le bloc d'ancrage (50) est configuré pour être mécaniquement interverrouillé avec le boîtier (14), et dans lequel le bloc d'ancrage (50) inclut un corps principal (52), ainsi qu'une première et une seconde patte d'interverrouillage (60, 62) qui se projettent vers l'extérieur depuis le corps principal (52), et dans lequel la première et la seconde patte d'interverrouillage (60, 62) sont configurées pour être reçues à l'intérieur d'un premier et d'un second réceptacle d'interverrouillage prévu dans la cavité intérieure (40) du boîtier (14), et dans lequel une première extrémité (54) du bloc d'ancrage (50) est disposée dans la cavité intérieure (40) du boîtier (14) et une seconde extrémité (56) est disposée dans l'ouverture à câble de la pièce de queue (44).
  2. Élément terminal (10) destiné à être monté sur un câble de distribution en fibres (12) selon la revendication 1, dans lequel le boîtier (14) est tel que l'élément terminal (10) présente une densité d'adaptateurs supérieure ou égale à 0,0744 adaptateurs/cm2 (0,48 adaptateurs/in2).
  3. Élément terminal (10) destiné à être monté sur un câble de distribution en fibres (12) selon la revendication 1, dans lequel le boîtier (14) est tel que l'élément terminal (10) présente une densité d'adaptateurs supérieure ou égale à 0,1488 adaptateurs/cm2 (0,96 adaptateurs/in2).
  4. Élément terminal (10) destiné à être monté sur un câble de distribution en fibres (12) selon la revendication 3, dans lequel les adaptateurs (36) sont des adaptateurs du type SC double.
  5. Élément terminal (10) destiné à être monté sur un câble de distribution en fibres (12) selon la revendication 1, dans lequel une longueur du bloc d'ancrage (50) disposée dans l'ouverture à câble est plus grande que 25 % d'une longueur totale du bloc d'ancrage (50).
  6. Élément terminal (10) destiné à être monté sur un câble de distribution en fibres (12) selon la revendication 1, dans lequel le plateau de cheminement de fibres (96) inclut une pluralité de trous de montage (106) qui sont d'une taille propre à recevoir une pluralité de broches de montage (108) disposées dans la cavité intérieure (40) du boîtier (14).
  7. Élément terminal (10) destiné à être monté sur un câble de distribution en fibres (12) selon la revendication 1, dans lequel le couvercle (18) inclut une pluralité de gradins en angle (32), tels que chaque gradin en angle (32) définit une pluralité de surfaces de montage (34), chaque gradin en angle (32) formant un angle oblique avec la base (16) et chaque surface de montage (34) forme un angle d'accouplement oblique avec une surface de montage adjacente (34) sur le gradin en angle (32).
  8. Élément terminal (10) destiné à être monté sur un câble de distribution en fibres (12) selon la revendication 7, dans lequel des adaptateurs (36) de la pluralité d'adaptateurs (36) sont disposés sur chacun des gradins en angle (32), les adaptateurs (36) étant orientés de façon arquée sur chacun des gradins en angle (32).
EP08838182.7A 2007-10-09 2008-10-09 Mini-borne de connexion Active EP2198328B1 (fr)

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EP13197657.3A EP2722700A1 (fr) 2007-10-09 2008-10-09 Terminal mini-goutte

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US97863807P 2007-10-09 2007-10-09
PCT/US2008/079328 WO2009049037A2 (fr) 2007-10-09 2008-10-09 Mini-borne de connexion

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EP13197657.3A Division-Into EP2722700A1 (fr) 2007-10-09 2008-10-09 Terminal mini-goutte

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EP2198328A2 EP2198328A2 (fr) 2010-06-23
EP2198328B1 true EP2198328B1 (fr) 2018-09-26

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EP (2) EP2198328B1 (fr)
AU (1) AU2008310798B2 (fr)
BR (1) BRPI0817857B1 (fr)
ES (1) ES2700434T3 (fr)
MX (1) MX2010003804A (fr)
WO (1) WO2009049037A2 (fr)

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BRPI0817857B1 (pt) 2019-02-12
MX2010003804A (es) 2010-04-21
US20090148118A1 (en) 2009-06-11
WO2009049037A3 (fr) 2009-08-27
ES2700434T3 (es) 2019-02-15
AU2008310798B2 (en) 2013-11-21
AU2008310798A1 (en) 2009-04-16
US8213761B2 (en) 2012-07-03
EP2198328A2 (fr) 2010-06-23
AU2008310798A2 (en) 2010-08-19
WO2009049037A2 (fr) 2009-04-16
EP2722700A1 (fr) 2014-04-23
US7844158B2 (en) 2010-11-30
WO2009049037A9 (fr) 2009-06-04
US20110067452A1 (en) 2011-03-24
BRPI0817857A2 (pt) 2015-04-07

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